Electric torch for welding, brazing, and cutting



Nov. 22,1927. 1,650,431

G. W. CRANDALL I ELECTRIC TORCH FOR WELDJING, BRAZING, AND CUTTING FiledMarch 9. 1926 atented Nov. 22, 1927;.

"A; lTED' A "PATENT OFFICE.

ELECTRIC TORCH FOR WELDING, BRAZING, AND CUTTING.

Application'flled March 29, 1926. Serial No. 98,058.

My invention relates to-electric torches,

and has to do more particularly with apparatus of the above characteradapted for welding, brazing and cutting, my improved torch beingadapted for all of the above uses. I

An object of my invention is to provide a portable electric torch of theabove character which is simple in construction, positive in operation,easy to apply and light in weight.

7 the handle A, but angularly the handle For a better understanding ofmy invention reference is to be had to'the accompanying drawing, inwhich a Fig. 1 is a side elevation of my improved torch; and

Fig. 2 is a top plan view of the upper carbon holding bracketstraightened out to more clearly show the construction of the variousparts.

' Referring now more in detail to the construction' employed, I providea suitable handle which is preferably in the form of a tubular member ofinsulating material such as fibre, but f a substance that will notbeafiected by the heat from the are. This handle A is bored throughoutits length, the lower end 5 being large enough to take two conductors67, with conductor 6 passing out of an opening 8 bored through the sideof the handle so said conductor may be extended to the carbon. The sinle remainmg conductor 7 extends up t rough the smaller bore 9 and out ofthe end of the holder the upper carbon. The member- -A has itslower endshaped so that it may be readily grasped in the hand by the operator musing and applying the torch.

For hold ng the carbons I preferably provlde two slmilar brackets, eachadjustable so that it not only may beadjusted along adjusted accordingto the length of the carbon and the work it is bemg employed on.Referring to the upper brac et, forv its construction I provide aclamping member 10 which encircles an ma. be fastened by the clampingnut 11 so t at the bracket may be raised and lowered on the handle. Thearm of this bracket 10 carries a carbon holder 12 which is pivotallyattached to bracket 10 and adapted to be clamped thereto by the clampingbolt and nut 13. The outer end clamping end of the holder 12 to adjustthe carbon as it reduces in length.- In order to apply the currentconnection closest to the arcing end of the carbon, and prevent thecarbon holder 12 from becoming hot, I

provide a terminal clamp 16 which fastens around the carbon Hand towhich the conductor terminal 17 is applied. This terminal clamp 16 isrotatable on the carbon 14 so'that it may be swung around into anyposition to clear the work to which the torch is being applied. By thebracket construction employed the carbons may be adjusted into any angleso that the arcing ends project out clear of the device and may bereadily applied to the work, whether it is welding, brazing or cutting.The lower carbon carrying bracket is preferably similar to the upperone, but is also connected to a finger lever or trigger 18, so that thecarbon may be manipulated or adjusted to form the arc. This finger lever18 is preferably ofan insulating material and is connected through alink 19 to the carbon bracket 12 so thatf as the trigger 18 is movedtoward and away from the bandle 5, the carbon points are correspondingly adjusted. Thus to adjust the device to secure the arc, the lever18 isifirst pushed outwardly to close contact between the two electrodecarbons and then lever 18 is, slowly ulled toward the handle A toseparate t e points of the carbon the proper distance to form thedesired are. To break the arc the trigger is pulled back to separate thecarbon points suificlently to interrupt the circuit. j

In the use of the device, the ositive wlre 7 is connected to thepositive eed wire on the arc welding machlne and the negative wire 6from the torch and the negative feed wire .from the main are clampedonto the metal table on which the work is placed while being "operatedupon, so the current flow is from negative through positive and into themetal table.

What I claim as new and desire to secure by United States Letters Patentis 1. A portable electric torch of the character described including ahandle, a pair of adjustable electrode carbon holders insulat inglysupported by the handle and having clamping elements to encircle thecarbon to hold the latter at an intermediate point, a

carbon held in each of said holders at an intermediate point, aconductor terminal clamped around each carbon intermediate its heldpoint and the arcin end, and conductors suitably held by the andle andconnected with the terminals.

2. A portable electric torch of the character described including ahandle, a pair of adjustable electrode carbon holders insulatinglysupported by the handle and having clamping elements to encircle thecarbon to hold the latter at an intermediate point, a carbon held ineach of said holders at an intermediate point, a conductor terminalclamped around each carbon intermediate its held point and the arcingend, said terminals being circularly adjustable around the carbon so asto clear the work being operated upon, and conductors suitably held bythe handle and connected with the terminals.

3. A portable electric torch comprising a handle, electrode holdersinsulatingly supported thereon, electrodes carried thereby, electricityconductors passing through the handle and extended laterally thereof anddisposed in opposed relation to constitute terminal clamp su ports, andterminal clam s carried there y and engaged with the e ectrodes. I

4. A portable electric torch comprising a handle, electrode holdersinsulatingly supported thereon. electrodes carried thereby, electricityconductors passing through the handle and extended laterally thereof anddisposed in opposed relation to constitute terminal clamp supports, andterminal clamps'carried thereby and engaged with the electrodes andarranged for axial adjust ment about the electrodes to clear the work.

5. A portable electric torch having a tubular handle, a pair of bracketssupported by the handle. an electrode carbon holder sup-. ported by eachbracket, one of said holders icing pivotallv supported by its bracket,

a bell crank lever pivoted at its mid-point to the tubular handle. onearm of the bell crank having a' connection to the pivotally supportedholder and the other arm of the hell crank having an aperture forreceiving the finger of an operator for adjusting the position of thecarbon holder, a conductor terminal clamped around each carbonintermediate its held point and the arcin end, and conductors supportedb the hand e and connected with the termina s.

In witness whereof, I hereunto subscribe my name this 20th day ofFebruary, 1926. G. WALTER CRANDALL.

